Module documentation for 0.3.0.1

Containers with merging via monoidal accumulation. The Monoid instances
provided by the containers and unordered-containers packages merge
structures in a left-biased manner instead of using the underlying monoidal
structure of the value.

This package wraps the types provided by these packages, but provides Monoid
instances implemented in terms of the value type's mappend. For instance,
the MonoidMap instance looks like,